Electrocatalytic Properties of Pyrochlore-Type Oxide for PEFC
Electrocatalytic Properties of Pyrochlore-Type Oxide for PEFC
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DOI：
10.1149/1.2981935
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发表时间：
2008-10
期刊：
影响因子：
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通讯作者：
T. Iwanaga;Satoko Takase;Y. Shimizu
中科院分区：
文献类型：
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作者：
T. Iwanaga;Satoko Takase;Y. Shimizu
系统研究了通过共沉淀法合成的各种烧绿石型氧化物（A2-xA'xB2O7− Z：A= Pb，A'= Pb，Bi，Sb，In；B= Ru）的电催化性能，用于聚合物电解质燃料电池电催化剂的氧还原、氢氧化和CO中毒耐受性。大多数烧绿石型氧化物可以在380-600℃的水溶液中通过共沉淀法合成。电极含有Pb1。 9In0。在 380 C 下制备的 1Ru2O7-Z 显示出高氧还原活性，在 2N H2SO4 中，+ 0.4 V vs. RHE 时为 181mA/cm2。此外，在同一溶液中，0.2 V vs. RHE 下 Pb2Ru2O7-Z 的氢氧化电流密度为 117mA/cm2。铅1。 9M0。 1Ru2O7-z (M= In, Sb, Bi, Pb)氧化物表现出较高的氧还原活性，其顺序为M= In> Sb> Bi> Pb。
Electrocatalytic properties of various pyrochlore-type oxides (A2-xA’xB2O7− Z: A= Pb, A’= Pb, Bi, Sb, In; B= Ru) synthesized by a co-precipitation method were systematically investigated for oxygen reduction, hydrogen oxidation and tolerance of CO poisoning for the electrocatalyst of the polymer electrolyte fuel cell. Most of the pyrochlore-type oxides could be synthesized by the co-precipitation method at 380-600 C in aqueous solutions. The electrode containing Pb1. 9In0. 1Ru2O7-Z prepared at 380 C indicated high oxygen reduction activity, 181mA/cm2 at+ 0.4 V vs. RHE in 2N H2SO4. In addition, hydrogen oxidation current density of Pb2Ru2O7-Z was 117mA/cm2 at 0.2 V vs. RHE in same solution. Pb1. 9M0. 1Ru2O7-z (M= In, Sb, Bi, Pb) oxides indicated rather high oxygen reduction activity in the order of M= In> Sb> Bi> Pb.